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| author | Segher Boessenkool <segher@kernel.crashing.org> | 2017-12-13 15:05:57 +0100 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2017-12-13 15:05:57 +0100 |
| commit | 2046f23f52d5ed4299f12e5f98a88491e4936c44 (patch) | |
| tree | fdd3d7a0babdfbf3b3c64e2de65288c9cc43e89b /libgo | |
| parent | 2b031ef48e365e256495a3e6d226a59f2290444f (diff) | |
| download | gcc-2046f23f52d5ed4299f12e5f98a88491e4936c44.zip gcc-2046f23f52d5ed4299f12e5f98a88491e4936c44.tar.gz gcc-2046f23f52d5ed4299f12e5f98a88491e4936c44.tar.bz2 | |
combine: Fix PR83393
In move_deaths we move a REG_DEAD note if the instruction combination
has extended the lifetime of a register so that the existing note is
no longer valid. We find that note using reg_stat, but what that finds
can refer to a later insn. If so, we cannot use the cached value. This
patch implements that.
PR rtl-optimization/83393
* combine.c (move_deaths): If reg_stat points to a too new insn in
last_death, do not use it: find the proper insn instead.
gcc/testsuite/
PR rtl-optimization/83393
* gcc.dg/pr83393.c: New testcase.
From-SVN: r255606
Diffstat (limited to 'libgo')
0 files changed, 0 insertions, 0 deletions